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There could be various reasons why a UTF-8 character is not appearing on the console. Some of the most common reasons are:

1. Inconsistent encoding: If the console and the code editor or file have different encoding schemes, the console may not be able to display certain UTF-8 characters correctly.

2. Wrong console font: The console font may not support the character set that the UTF-8 character is a part of. This can result in the character not being displayed properly.

3. Improper code: If the code that is supposed to display the UTF-8 character is incorrect or incomplete, the character may not appear on the console.

4. Operating system limitations: Some operating systems may not support the display of certain UTF-8 characters due to limitations in their character sets.

To resolve the issue, the encoding of the console and the file should be consistent, the console font may need to be changed, and the code should be debugged and corrected if necessary.